Pump-rod lifter.



L. JOHNSON.

PUMP ROD LIFTER. APPLICATION FILED SEPT. e, 1910.

' 984,764. v Patented Feb. 21, 1911.

um/W601 UNITED STATES PATENT cream.

I LEONARD JOHNSON, OF BLUE RIVER, WISCONSIN, ASSIGNOR 0F ONE-HALF TO C.J.

NOLSTAD, OE BLUE RIVER, WISCONSIN.

PUMP-ROD LIFTER.

Specification of Letters Patent.

Patented Feb. 21, 1911.

Application filed September 6, 1910. Serial No. 580,596.

To all whom it may concern:

Be it known that I, LEONARD JOHNSON, citizen of the United States,residing at Blue River, in the county of Grant and State of lVisconsin,have invented certain new and useful Improvements in Pump-Rod Lifters,of which the following is a specification.

This invention relates to pump rod lifters and has for its object theprovision of a comparatively simple and thoroughly efiicient pipe or rodwhen said jaws are tilted.

A further object is to provide the transverse gripping bars with aplurality of cutting edges so that when one cutting edge becomes worn ordull the bar may be removed and reversed, thereby to present a newcuttiiig edge to the work.

A still further object is generally to improve this class of devices soas to increase their utility, durability and efficiency.

For a full understanding of the invention reference is to be had to thefollowing description and accompanying drawings, in which Figure 1 is aperspective view of a pump rod lifter constructed in accordance with myinvention. Fig. 2 is a side elevation of a lifter showing the same inposition on a pump rod or tube. Fig. 3 is a vertical sectional view ofthe same. Fig. 4 is a top plan view of the lifter detached from thepipe, the hoisting chain, trunnions and cotter pins being omitted forthe sake of clearness.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the accompanying drawingby the same reference characters.

The improved pump rod lifter forming the subject-matter of the presentinvention includes pivotally united jaws 5, each comprising spacedplates 6 and 7 between which are interposed filling blocks 8, saidblocks being rigidly secured to the side-plates by bolts, rivets orsimilar fastening devices 9.

The inner ends of the side-plates are extended longitudinally beyond theinner fiat faces 10 of the filling blocks to form cars 11 adapted toembrace the pump rod or tube indicated at 12. One of the side-plates ofeach jaw is provided with a laterally extending pin or trunnion 13 whichenters a correspondingly shaped opening formed in the adjacentside-plate 0f the mating aw, thus to form a pivotal connection betweenthe jaws and to permit the latter to be moved into or out of engagementwith the rod or tube 12. The side-plate 7 of one jaw bears against theouter face of the mating jaw, said jaws being held in assembled positionby pins 14 extending through openings formed in the trunnions 13, asshown.

The inner flat face 10 of each fillin block 8 is provided with anangularly disposed recess 15 in which is seated a transverse grippingbar 16 having a plurality of angular cutting edges 17 adapted to biteinto the walls of the rod or tube 12 so as to positively grip the rod ortube and thus eifectively prevent accidental slipping thereof during theraising and lowering operation.

The transverse gripping bars 16 are preferably tapered and extendthrough correspondingly shaped openings formed in the adjacentside-plates of the pivoted jaws, said bars being removable and retainedin position on the jaws by pins 18. By forming the gripping bar 16 inthis manner when one of the cutting edges 17 thereof becomes dull orworn by constant use, said bar may be readily removed and reversed so asto present a fresh cutting edge to the work, and thereby materiallyprolong the life of the lifter.

The opposite ends of the filling blocks 8 are provided with longitudinalslots 19, through each of which extends one of the fastening devices 9.Extending within the slots 19 and secured in any suitable manner to theadjacent bolts or fastening devices 9 is a chain, cable or otherflexible element 20, the upper end of which is attached to a hoistingdevice of any suitable construction (not shown), for the purpose ofraising or lowering the rod or tube 12.

The transverse gripping bars 16 are preferably disposed at the upperedges of the side-plates of the pivoted jaws on one side of the pivotalaxis thereof so that when the outer or free ends of the jaws are movedupwardly the cutting edges of said bars will be forced into engagementwith the rod or tube 12 and when the outer or free ends of the jaws arelowered the transverse bars will be moved out of engagement with thepump rod so as to allow the lifter to slide longitudinally on the pumprod.

In operation the lifter is positioned over the end of the tube or rod 12with the rod disposed between the flat faces 10 of the filling blocks,after which the hoisting device is actuated to exert an upward pull onthe lifter which causes the transverse bars 16 to bite into the tube orrod and thus effectively hold the same during the elevating operation.In order to detach the lifter from the pump rod or tube it is merelynecessary to allow a slight slack in the chain 20 when the outer ends ofthe jaws will drop by gravity and thus permit the removal of the pumprod or tube, as will be readily understood.

It will, of course, be understood that the pump rod lifters may be madein different sizes and shapes, and that as many of said lifters may beemployed for 'aising and lowering a pump rod as may be found desirableor necessary, without departing from the spirit of the invention.

Having thus described the invention what is claimed as new is 1. A pumprod lifter including pivotally united jaws having overlapping ears andeach provided at its pivoted end with a face having a seating recessformed therein, and gripping bars of angular crosssectional formationseated in said recesses.

A pump rod lifter including pivotally united jaws having their innerends provided with overlapping ears, and transverse gripping bars ofangular cross-sectional formation detachably secured to the jaws andpiercing saidears.

3. A pump rod lifter including co-acting jaws, each formed of matingplates, filling members interposed between the plates of each jaw andhaving their inner ends provided with seating recesses, transversegripping bars seated in said recesses, and means connected with theouter ends of the filling members for attachment to a hoisting de vice.

4. A pump rod lifter including co-acting jaws, each provided withlongitudinally disposed ears, one ear of each jaw being provided with alaterally extending pin adapted to enter a correspondingly shapedopening in the ear of the mating jaw, removable t ansverse gripping barssecured to the jaws and piercing said ears, and means secured to theouter ends of the jaws for attachment to a hoisting device.

A pump rod lifter including pivotally united jaws, each formed of spacedplates, filling blocks interposed between the plates and having theirinner faces spaced from the pivoted ends of the jaws to form ears, andtheir outer ends provided with longitudinal slots, there being seatingrecesses formed in the inner faces of the filling blocks, fasteningdevices piercing the said plates and filling blocks, one of thefastening devices of each jaw piercing the ad j acent longitudinal slot,transverse gripping bars seated in the recesses and provided with aplurality of cutting edges, and a flexible suspension element having itslower end extending within the slots and anchored on the adjacentfastening devices.

In testimony whereof, I affix my signa; ture in presence of twowitnesses.

LEONARD JOHNSON. [1 s] lVitnesses AMANDA COUMBE,

1. H0121. COUMBE.

